Paypopup has been migrated to InfinityAds since May 1, 2010.
And we would like to remind all former Paypopup publishers that we have sent final payments to publishers who had cancelled their account before April 30, 2010.
For Paypopup publishers who had not cancelled their account before April 30, 2010, they were assumed to relinquish their publisher payments. We are no longer to process request for payment from Paypopup publishers anymore.
For webmasters that would like to continue running pop under ads, you can always sign up for an InfinityAds publisher account here:
http://member.infinityads.com/publisher/signup
If you have any questions or concerns, please feel free to contact us at http://paypopup.com/contact_us.php